Parchmentized fabric and process of producing the same



I Patented Mar. 30, 1931 PARonMnN'rrzEn FABRIC AND PROCESS or Y v PRODUCING-THE SAME Albert Bodmer, Wattwil, Switzerland, assignor to Heberlein Patent Corporation, New York, N. Y" a corporation of New York I =No Drawing.

3 Claims.

, This invention relates to novel par'chmentized fabrics and to processes of .producingthe same. In accordance with the invention, the strands of i a fabric are parchmentizedi. e.,'stiffened throughout the area of said fabric, this operation being effected in such manner thatall of the fabfric strands including those to which a printing medium has been applied, are stiffened in'the mannerspecified.v 1 I Variousother features, objects and character'- istics of my invention will become apparent from the following detailed description.

The invention resides in the novel fabric, processes and features of the character hereinafter described and claimed.

It is well understoodin the art that cotton and artificial silk fabrics may be prepared for commercial use by pattern printing thereon with a suitable dye dissolved in a carrier comprising a I 0 gum, the latter, during the printing operation,

forming a coating on those fabric strands in the printed portions. After the fabric has thus been printed, it is subjected as an entirety to a parchmentizing action. Between the printed portions, the parchmentizing acid stiifens and increases the transparency of the fabric strands but, by reason of the shielding effect of the gum coating, such acid does not cause any substantial parchmentizing action on the fabric strands in and 0 throughout the printed portions. It results, therefore, that in the printed portions, the fabric retains its original soft, flexible character. For

some purposes, this is an undesirable characteristic.

In accordance with the present invention, there is produced a novel fabric, the strands of which, throughout the entire fabric area, are stiffened by a parchmentizing action. That is, the fabric strands in the printed parts as well as those be- (1 tween such parts are of still character as effected by the parchmentizing process. This novel result may be attained in several ways by the use of a variety of materials. I

The printing may obviously be put on before 5 or after parchmentizing. When it is put on first, a cotton fabric is printed with a cellulose ester solution to which a pigment has been added. 'Ihereupon, the printed fabric is dried and immersed in the parchmentizing acid or other agent. The latter parchmentizes the fabric strands between the printed portions and at the same time parchmentizes the fabric strands in the printed portions by reason of the fact that said last named fabric strands are covered or coated by 5 the cellulose ester which is readily permeable to barium'sulphate, titanium Application June 25, 1 934,,Serial In Germany June 28,1933

the parchmentizing'agent. In this manner, the

fabric strands,,throughout the area of the fabric,

are stiffened, Furthermore, by the described agent is important in order that there may be obtained the desiredoptical contrast between the non-transparent '(printed) and the transparent (non-printed) portions. g

It shall be understood that various other cellulose solutions may be utilized in connection with the described printing operation. Thus, for example, there may be utilized a viscose or cuprammonium cellulose solution in which a pigment is mixed and then used for printing purposes.

The parchmentizing action may be effected by any suitable agent such as heretofore utilized for such purposes. Sulphuric acid serves in an advantageous manner for the intended purpose.

Any one of a number of pigments may be utilized in accordance with the invention, it being.

ordinarily important, however, for the selected pigment to be insoluble in the parchmentizing agent which is to be used. Thus, for example, white, metallic oxide, lakes and body colors may be used as pigments.

Examples 1. A mercerized cotton-muslin fabric is printed with a paste of the following composition:

After drying, the fabric is passed through sul- I phuric acid of 54 Be. for 8seconds at 15 0.. whereupon .it is immediately washed and completed on a frame. I

2. A mercerized cotton-muslinfabric is printed with a pasteof the following composition:

Grams Cotton-linters 28 l I Copper-oxide-ammonium-solution, containing 18 grams of copper per liter 832 Titanium white 140 After drying, the fabric is passed through sulfuric acid of 53 B. for 12 .seconds at 17 0.,

whereupon it is immediately washed and completed on a frame.

It will be understood that the design effects produced by the transparent and non-transparent 5 zones may be cross-dyed (topped) in any desired manner. The process may be used in connection with all kinds of fabrics, weaves, and other surfaces consisting of natural or artificial cellulose fibers or mixtures of the same. The invention also has application to the parchmentizing of linen and natural silk fabrics as well as cotton and artificial silk fabrics.

While the invention has been described with respect to certain particular preferred examples which give satisfactory results, it will be understood by those skilled in the art after understanding the invention, that various changes and modiflcations'may be made without departing from the spirit and scope of the invention and it is intended therefore in the appended claims to cover all such changes and mo cations.

What is claimed as new and desired to be secured by Letters Patent is:

1. A process for preparing a patterned fabric which comprises printing a cellulose-containing composition comprising a pigmention a cellulosecontaining fabric and passing the fabric through a transparentizing swelling agent, said pigment being capable of resisting the action of said swelling agent, said cellulose composition being permeable to said transparentizing agent, whereby the portions of the fabric to which the cellulose composition has been applied appear relatively less transparent than the portions to which the cellusaid pigment being capable of resisting solution by said agent, whereby the portions of the fabric to which the cellulose composition has been ap plied appear relatively less transparent than the portions of the fabric to which the cellulose has not been applied, the fabric being of about the same stiffness in the printed and unprinted portions.

3. A cotton fabric having a pattern printed thereon, the pattern being composed of a cellulose composition permeable to a parchmentizing agent and containing a parchmentizing' resisting pigment, the fabric and the pattern being of about the same degree of stiffness, by reason of both having been treated after printing with a parchmentizing agent, the printed pattern having a substantial degree of opaqueness, the background being substantially transparent.

Y ALBERT BODMER. 

